Effect of Pina-fin Material on Heat Transfer and Flow Resistance Characteristic of Rectangular Channel

摘要

Numerical simulation and experiments study were performed to obtain heat transfer and flow resistance characteristics in a channel with pin-fin arrays of trailing edge. Five models with different pin-fin materials were designed to simulate, which contained the rectangular duct model based on the flow and heat transfer of real blade, and four enlarged models with different pin-fin materials based on the similarity theory. One enlarged model was also experimented on, the simulation results of that model tend to agree with experimental data. The results of simulation show that the heat transfer coefficients of the rectangular channel wall increase with the thermal conductivity of pin-fin. And there is one thermal conductivity coefficient, which is determined by the Biot number of pin-fin, makes the average heat transfer of the enlarged model wall same as the real blade path model.